@@ -868,11 +868,14 @@
       (let* ((db      (env:open-db (if (null? remargs) "envdat.db" (car remargs)))))
 	(env:save-env-vars db envcap)
 	(env:close-database db)
 	(set! *didsomething* #t))))
 
-;; delta "language" will eventually be res=a+b-c but for now it is just res=a-b 
+;; delta "language" will eventually be res=a+b-c but for now it is just res=a-b
+;;
+;; db file can be stuck on the end of the command line:
+;;   megatest -envdelta start-end -dumpmode bash -o .ezsteps/step5.sh /tmp/myfile.db 
 ;;
 (let ((envdelta (args:get-arg "-envdelta")))
   (if envdelta
       (let ((match (string-split envdelta "-")));; (string-match "([a-z0-9_]+)=([a-z0-9_\\-,]+)" envdelta)))
 	(if (not (null? match))